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In dentistry, the reaction force exerted per unit area of the brush during deflection; used interchangeably with firmness in describing toothbrush bristles or filaments; depends primarily on length and diameter of filaments or bristles.


half way to rigidity, tetany; result of insufficient use of the part.

Patient discussion about stiffness

Q. can acupuncture help neck stiffness? I have neck pain- especially stiffness every week- once or twice. Try a lot of things but always comes back. Can acupuncture help? tell me please because if not- I dont want to put needles for nothing...

A. Acupuncture can fix most cases of neck pain, usually in 3-5 treatments. Most neck pain is due to muscular tightness, and acupuncture is very effective at releasing contracted muscles.

here's an article on Acupuncture for Back Pain:

The treatment of neck pain is very similar. There are very few cases of side effects with acupuncture. However, if you experience consistent pain that get progressively worse, you should visit your MD for x-rays and an MRI to rule out any structural problems (bone spurs, disc degeneration, tumors, etc).

Q. I received a corticosteroid injection in my left knne th A.M. Knee is all stiff & swollen. Is this normal?

A. actually you might have already had an arthritis in your knee before, then your doctor injected you with a corticosteroid into the affected joint. usually you will feel better (less pain) in your affected joint. if the symptoms don't improve then I suggest you to go see your specialist for further advise and treatment.

Q. i cant stop getting a hard on erection stiffy embarrassing crease in trousers

A. Have you heard of priapism,a condition in which the penis is continually erect; usually painful and seldom with sexual arousal. If you suffer from this you should go see a doctor about it.

More discussions about stiffness
References in periodicals archive ?
Flexural modulus or bending modulus is the bending tendency of material that is the ratio of stress over strain in flexural deformation.
There was no statistical change in the tensile or flexural modulus for the 2533, but with the increase of nylon segments in 5533 and 7533, the mechanical properties improved dramatically.
Compared with the control, that is, at 0% MFA, the MFA treatment at the 5 wt% total solids content significantly increased both the flexural strength and flexural modulus of the composites (Fig.
Flexural modulus of OW FV2 CT-4 FRP composites is increasing with increasing volume fraction of fiber and it is 1.
As can be seen, in case of the structure without mineral fillers or with a 10% of fillers content an improvement of the flexural modulus with 34% and 46 %, respectively, was reached.
NanoMed EX compounds can be tailored to provide flexural modulus between these materials without sacrificing elongation.
Figures 5-9 illustrated the tensile strength, flexural strength, tensile modulus, flexural modulus, and hardness versus BPU content for unfilled and 10-phr filled (kaolin) BPU/PF IPN.
Flexural modulus ranges between 150,000 and 300,000 psi and specific gravity is 1.
The company's latest addition is a materials testing system used to test tensile modulus and strength, flexural modulus and strength, compressive modulus and strength, ultimate strength, elongation at break, ductility, resilience and toughness.
It has a flexural modulus of approximately 300 kpsi, and is said to be the stiffest TPO that's approved for use at GM.
In fact, a "time-adjusted" value for flexural modulus is utilized because plastics, when placed under load, will creep.
1) Flexural modulus, psi (MPa) D790 550,000 (3,790) Flexural strength, psi (MPa) D790 19,000 (131.